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Asked by Chittaranjan Last Modified
Answer 
Linking Tables in Hibernate (Spring Boot)
1. Use JPA Annotations:
@OneToOne – One-to-One mapping
@OneToMany / @ManyToOne – Parent-child relationship
@ManyToMany – Join tables
2. Example: One-To-Many (User → Posts)
@Entity
public class User {
@Id @GeneratedValue
private Long id;
private String name;
@OneToMany(mappedBy = "user", cascade = CascadeType.ALL)
private List<Post> posts;
}
@Entity
public class Post {
@Id @GeneratedValue
private Long id;
private String content;
@ManyToOne
@JoinColumn(name = "user_id")
private User user;
}
3. Repository & Service:
Use JpaRepository<User, Long> to handle DB operations.
Save parent (User), Hibernate handles child (Post).
Would you like help with a specific mapping?
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